package com.chixing.b;

import com.chixing.a.Father;

public class Test {
    public static void main(String[] args) {
        Father father = new Father();
        System.out.println(father.pub);
        System.out.println("================");
        Son son = new Son();
        son.extendDemo();

        String s1="hello";
        String s2=new String("hello");
        System.out.println(s1.equals(s2));

        CheckPassword.check("abc123");
    }
}
